/*
 *
 * Copyright (c) 2007, LilyStudio Nanjing University.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of LilyStudio Nanjing University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.lilystudio.veryftp.ajax;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.lilystudio.veryftp.common.Constant;

/**
 * @author Samson
 * 
 */
public class LoadingIntroServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

	private static Log log = LogFactory.getLog(LoadingIntroServlet.class);

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest,
	 *      javax.servlet.http.HttpServletResponse)
	 */
	@Override
	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		String introFileAddr = request.getParameter("intro");
		log.info("Intro address: " + introFileAddr);

		// String xmlHeader = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";
		String xmlContent = getFileContent(introFileAddr);
		try {
			Thread.sleep(2000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		response.setContentType("text/xml;charset=UTF-8");
		response.setHeader("Cache-Control", "no-cache");
		response.getWriter().write(xmlContent);
		log.info("Response to customer: " + xmlContent);
		response.getWriter().flush();
	}

	/**
	 * @param introAddr
	 * @return
	 */
	protected String getFileContent(String introFileAddr) {
		String fileContent;

		if (introFileAddr.indexOf("F:/veryftp") != -1) {
			introFileAddr = introFileAddr.substring(11);
		}
		introFileAddr += ".xml";

		File introFile = new File(System.getProperty(Constant.PROJECT_BASEDIR)
				+ "tags/" + introFileAddr);
		log.info("Intrduction File Absolute Path: "
				+ introFile.getAbsolutePath());
		BufferedReader reader;
		try {
			reader = new BufferedReader(new InputStreamReader(
					new FileInputStream(introFile), "UTF-8"));
			StringBuffer buf = new StringBuffer();
			String tempStr;
			while ((tempStr = reader.readLine()) != null) {
				buf.append(tempStr);
			}
			reader.close();
			fileContent = buf.toString();
		} catch (IOException ioe) {
			// fileContent = "Can't find the Introduction.找不到介绍信息！";
			fileContent = "";
		}
		return fileContent;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest,
	 *      javax.servlet.http.HttpServletResponse)
	 */
	@Override
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}
